<template>
  <view class="goods-item">
    <!-- 商品左侧图片区域 -->
    <view class="goods-item-left">
        <radio :checked="goods.goods_state" color="#C00000" v-if="showRadio" @click="radioClickHandler"/>
      <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
      
    </view>
    <!-- 商品右侧信息区域 -->
    <view class="goods-item-right">
      <!-- 商品标题 -->
      <view class="goods-name">{{goods.goods_name}}</view>
      <view class="goods-info-box">
        <!-- 商品价格 -->
        <view class="goods-price">￥{{goods.goods_price | tofixed }}</view>
        <uni-number-box :min="1" :value="goods.goods_count"@change="numChangeHandler" v-if="showNum"></uni-number-box>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
      // 定义 props 属性，用来接收外界传递到当前组件的数据
        props: {
          // 商品的信息对象
          goods: {
            type: Object,
            defaul: {},
          },
          showRadio:{
            type:Boolean,
            // 默认情况下不会展示radio组件
            default:false
          },
          // 是否展示价格右侧的 NumberBox 组件
            showNum: {
                type: Boolean,
                default: false,
              },
        },
    data() {
      return {
   // 默认的空图片
      defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    filters:{
      tofixed(num){
      return Number(num).toFixed(2)
      }
    },
    methods:{
      // 这是radio组件的 点击事件处理函数
      radioClickHandler(){
        this.$emit('radio-change',{
          // 商品的id
          goods_id:this.goods.goods_id,
          goods_state:!this.goods.goods_state
        })
      },
     // NumberBox 组件的 change 事件处理函数
     numChangeHandler(val) {
       // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件
       this.$emit('num-change', {
         // 商品的 Id
         goods_id: this.goods.goods_id,
         // 商品的最新数量
         goods_count: +val
       })
     }
    }
  }
</script>

<style lang="scss">
.goods-item {
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;

  .goods-item-left {
    margin-right: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    .goods-pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }

  .goods-item-right {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
    }
    .goods-info-box{
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .goods-price {
      font-size: 16px;
      color: #c00000;
    }
  }
}
</style>
